Get a hub motor
- Thread starter EbikeMaui
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The calculator on ebikes ca is very close from what I have seen, Bob Mcree also found this out as well. Efficiency is a tricky one to gauge as so many factors can make a ride seem more or less efficient, the only way to do it is to run dyno tests under a controlled situation, most people dont care and would rather be out riding their bikes. I of course always peddle hard which helps with my efficiency and keeps my weight down, which makes me more efficient 
Knoxie
Knoxie
Bottom line is how fast, and how many Wh/km. My bike weighs 280lbs with rider, and I have posted my top speed as well as speeds up grades along with DrainBrain data for various trips.
To go 40mph up a 10% grade with a streamlined upright bike takes about 3200W to the road. Change the grade to 12.8%, and the S&P calc gives 35.0mph which closely matches my observed 35.x mph speed. On the 4.25% grade @ 48mph, S&P calculates out to 2700W. As speed increases, current goes down due to back emf from the motor
To go 40mph up a 10% grade with a streamlined upright bike takes about 3200W to the road. Change the grade to 12.8%, and the S&P calc gives 35.0mph which closely matches my observed 35.x mph speed. On the 4.25% grade @ 48mph, S&P calculates out to 2700W. As speed increases, current goes down due to back emf from the motor
EbikeMaui
1 kW
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Motor Specs tell the TRUTH. YOU do not know what the truth is obviously.Lowell said:Bottom line is how fast, and how many Wh/km. My bike weighs 280lbs with rider, and I have posted my top speed as well as speeds up grades along with DrainBrain data for various trips.
To go 40mph up a 10% grade with a streamlined upright bike takes about 3200W to the road. Change the grade to 12.8%, and the S&P calc gives 35.0mph which closely matches my observed 35.x mph speed. On the 4.25% grade @ 48mph, S&P calculates out to 2700W. As speed increases, current goes down due to back emf from the motor
EbikeMaui said:Motor Specs tell the TRUTH. YOU do not know what the truth is obviously.Lowell said:Bottom line is how fast, and how many Wh/km. My bike weighs 280lbs with rider, and I have posted my top speed as well as speeds up grades along with DrainBrain data for various trips.
To go 40mph up a 10% grade with a streamlined upright bike takes about 3200W to the road. Change the grade to 12.8%, and the S&P calc gives 35.0mph which closely matches my observed 35.x mph speed. On the 4.25% grade @ 48mph, S&P calculates out to 2700W. As speed increases, current goes down due to back emf from the motor
The truth is that the average ebike customers care about end results and bottom lines. If the bike goes as fast and as far as they need it to go, they're happy.
What part of 40mph up a 10% grade on a 280lb bike do you not understand?
CGameProgrammer
10 kW
What part of "the manufacturer" do you not understand? Crystalyte is the manufacturer, not Lowell. If you want manufacturer specs, contact the manufacturer! Or maybe one of the vendors like electricrider.com or ebikes.ca.
In any case, the most important data are real-world results.
In any case, the most important data are real-world results.
CGameProgrammer said:
The problem is as manufacturers data are pretty bad.
Vendor show as much better simulation results and the real motor are probably close to that simulation.
So we can expect the motor's parametres will be close to manufacturers data in the future when manufacturers brand will be as famous as others famous brands on the market.
It is the way Chinese like to do theirs busines.
( The price will stay at the same level but parameters and/or quality will drop for the sake of cutting the costs/ increase theirs margins )
CGameProgrammer said:
I think Randy is just upset that my X5 hub motor outperforms his 5lb smoking disc in every category. His purpose built hillclimb special beaten at it's own game by a cheap Chinese hub motor. And my bike will only get quicker with the new Emoli's. 8)
Yes, that's how I viewed it.
Resorting to calling your performance figures as BS is an admission of defeat.
And resentment.
Resorting to calling your performance figures as BS is an admission of defeat.
And resentment.
Drunkskunk
100 GW
Lowell said:
Volcano Boy Demands a sacrfice!
Quick, someone throw in some motor specs and a virgin, or Volcano Boy will explode!
patrick_mahoney
100 W
I'm hesitant to post to this thread... I feel like I need to don protective gear.
I'd just like to point out that my measurements with my Hyperion E-meter ( http://aircraft-world.com/prod_datasheets/hp/emeter/emetermanual.htm ) and my Garmin Foretrex GPS have matched very closely with the Ebikes.Ca simulator. I measured at 4 different voltages and I was impressed with how accurate it was with my Crystalyte 5304 motor.
I'd just like to point out that my measurements with my Hyperion E-meter ( http://aircraft-world.com/prod_datasheets/hp/emeter/emetermanual.htm ) and my Garmin Foretrex GPS have matched very closely with the Ebikes.Ca simulator. I measured at 4 different voltages and I was impressed with how accurate it was with my Crystalyte 5304 motor.
Hi Patrick
Hey dont worry about nothing!! I found the ebikes sim to be very accurate to the e-bikes sim with the X5 as well, other people who have not tried an xlyte motor can not make any comment as they dont know! there is no need to worry, the xlyte 5 series is a great motor, sure its heavy but it gets the job done and is available unlike a lot of other options.
I am done arguing with other posters on here if you catch my drift! as real world performance be it videos, user reports and gps data etc etc backs up the sim to the point where its not worth any argument, sure there are other setups that suit other people but if you find what you have suits you then nobody should tell you any different, unless you want another option as you are unhappy?
The Puma is performing so well for me at the moment, I dont need a chart or a simulator, it just plain puts a smile on your face, you know when something works!! that said 72V its its limit, however the X5 can take a lot more, Thanks to Mark I will put 120V up one very soon.
Cheers
P
Hey dont worry about nothing!! I found the ebikes sim to be very accurate to the e-bikes sim with the X5 as well, other people who have not tried an xlyte motor can not make any comment as they dont know! there is no need to worry, the xlyte 5 series is a great motor, sure its heavy but it gets the job done and is available unlike a lot of other options.
I am done arguing with other posters on here if you catch my drift! as real world performance be it videos, user reports and gps data etc etc backs up the sim to the point where its not worth any argument, sure there are other setups that suit other people but if you find what you have suits you then nobody should tell you any different, unless you want another option as you are unhappy?
The Puma is performing so well for me at the moment, I dont need a chart or a simulator, it just plain puts a smile on your face, you know when something works!! that said 72V its its limit, however the X5 can take a lot more, Thanks to Mark I will put 120V up one very soon.
Cheers
P
knoxie said:
You definitely know when something works, as everyone who has ridden my bike has been very impressed. I raced a guy on a Honda Ruckus today, and after leaving him in the dust to the point it wasn't even a race, we stopped to chat and he was asking me all about my bike. Called his 50cc gasser a slow POS and was going to check out the Ebikes.ca web site. :lol:
The X5 is definitely overbuilt for what most people use it for... I'm really interested to find out what it's limits are.
Lowell said:
If you compare $400 hub to less than $40 motors it seems you have right. :wink:
But until manufacturer will not relase reliable parameters data and efficienxcy data (at full range of rpms and full range of voltage ) I will assume that motor has poor efficiency exept a handful of piece's for promotion purposes.
The manufacturers data (which we can see so far at his site) are very close to my assumption.
I believe for your $400 you get the hub motor, spokes and rim all laced up and ready to bolt on. A $40 motor needs a few extra pieces to be useful on a bicycle. At the very least you need to price it out as a ready to bolt on kit, or factor in shop time to fabricate the necessary bits. Don't forget to take into account the wide variety of suspension systems and frame designs.
eP said:
How much do you allow for motor mounts, sprockets, chain and fabrication time? As for comparisons based on cost, I always tell racers that if it rolls on the street, it's fair game. It's not my fault if someone doesn't bring enough.
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